Yarn support



23,1951 A. w. KEIGHT 2,565,562

YARN SUPPORT Filed May 51, 1946 :7 I I l 1N1 'ENTOR.

ALBERT W. KE [(3 HT f WW ATTORNEYS Patented Aug. 28, 1951 YARN SUPPORT Albert W. Keight, Cumberland, Md., assignor to Celanese Corporation of America, a corporation of Delaware Application May 31, 1946, Serial No. 673,502

1 Claim. 1

This invention relates to a yarn package support, and relates more particularly to a novel and improved combination of a yarn package support and a spindle or mandrel therefor which together act as a unit, the yarn package support being adapted to receive a magazine wrap or transfer tail at one end thereof.

A magazine wrap or transfer tail, as commonly understood in the art, is a portion of the inner end of the first yarn wound on the yarn support and is so disposed as to be positively secured during the winding of the remainder of the yarn package yet readily available for tying directly to the outer end of the yarn on another yarn package. The purpose of providing a magazine wrap or transfer tail on a yarn package is to enable an uninterrupted fiow of yarn to be maintained from a depleted yarn package to a full yarn package adjacent thereto, as in a creel or other yarn package holder upon which the yarn packages are supported.

Yarn package supports commonly employed in the art generally comprise some form of bobbin upon which the yarn windings are placed by suitable yarn winding devices. Various types of bobbins are available depending upon the size and shape of the yarn package desired and upon the ultimate use of the yarn package being formed. In the case of yarn packages which are to be employed for warping operations, the structure of the yarn package support is quite important I since it must be capable of receiving a large quantity of yarn, preferably with a magazine wrap or transfer tail, and must also allow the yarn to be unwound at high speed without causing excessive or uneven yarn tensions. Headless or singlefianged bobbins are preferable since the elimination of the flange at that end of the yarn package over which the yarn is drawn allows greatly in-- creased warping speeds while at the same time avoiding any injury to the yarn due to abrasion or snagging on the flange.

In forming a yarn package on a headless yarn package support, however, care must be taken to wind the yarn on said support with such a traverse that the yarn windings will form a hard, self-supporting structure. Normally, where the barrel of the yarn package support is straightsided and of a cylindrical cross-section, the formation of a self-supporting structure requires that the yarn be wound with such a traverse that the yarn package formed will have conical or tapered ends. Yarn packages of this type, however, tend to cause too much tension on the yarn during unwinding, as in warping operations.

The variation in the diameter of the yarn windings on the yarn package support where both ends of the yarn package are conically shaped, necessitates unwinding two laps at the end of the package to one at the center which makes for a somewhat uneven tension on the yarn being unwound.

It is, therefore, an important object of this invention to provide an improved hollow and thin-walled molded yarn package support, adapted to receive a magazine wrap or transfer tail, having a novel contour in the barrel or yarn receiving section thereof whereby yarn windings placed on said support may be unwound therefrom without any substantial variations in tension as the yarn is withdrawn.

Another object of this invention is to provide an improved yarn package support which is very light in weight, evenly balanced and possesses a smooth, dirt-shedding surface.

A further object of this invention is the provision of a novel rotatable mandrel or spindle adapted to receive said improved yarn package support and to hold the latter firmly and steadily during high speed yarn winding operations.

Other objects of this invention, together with certain details of construction and arrangement of parts, will appear from the following detailed description and drawing.

In accordance with my invention, I provide a combination of a novel internally and externally shaped yarn package support having means at one end thereof for receiving a magazine wrap or transfer tail, together with a novel shaped mandrel or spindle adapted to receive and retain said shaped yarn package support. My novel yarn package support comprises a hollow, thinwalled structure of a gradually tapered, generally cylindrical shape along the major port-ion of its length, the remainder comprisin a cone-shaped section or skirt integral therewith which tapers or flares outwardly toward the lowermost end of said support and which, in addition, contains a suitable groove for receiving a magazine wrap or transfer tail at the base thereof. The thickness of the walls of said yarn package support is substantially uniform throughout the structure. The novel mandrel or spindle fits within said thin-walled structure so that the yarn package support is firmly seated on and retained thereby, yet easily doffed or removed when the desired yarn package has been formed.

In the drawing, wherein the preferred embodiment of my invention is shown,

Fig. 1 is a front-elevational view of my novel 3 unitary yarn package support showing the contour thereof and the groove provided at the base of said support for receiving and retaining a magazine wrap or transfer tail, and

Fig. 2 is a cross-sectional view, taken along the line 2-2 of Fig. 1 in the direction indicated, showing the internal contour of said yarn package support and the driven mandrel or spindle upon which said yarn package support is seated durin winding operations.

Like reference numerals indicate like parts throughout both views of the drawing.

Referring now to the drawing, and more particularly to Fig. 2, there is shown the novel yarn package support of my invention, generally indicated by reference numeral 3, comprising a thinwalled, hollow, one-piece or unitary, preferably molded, structure having a tapered upper section or barrel 4 of gradually increasing diameter from top to bottom, and a lower cone-shaped section or skirt 5 integral therewith. At the head of upper section 4 there is provided a recessed shoulder 6 adapted to receive a suitable disc or ring (not shown) whereby the type of yarn wound on said yarn package support may be readily identified with respect to its denier, twist, fila ment count, etc. At th base of cone-shaped section 5, there is provided a circumferential groove I adapted to receive the several yarn windings which comprise the magazine wrap or transfer tail, a slot 8 communicating with groove 1 and acting as a convenient means for introducing a knife or other edged tool beneath said yarn windings and to sever the transfer tail so that the free end of the yarn thus obtained may be tied on to the yarn on a full yarn package adjacent thereto.

The entire yarn package support 3 is seated on suitable positioning and retaining means carried on a spindle generally indicated by reference numeral 9. The spindle comprises a shaft l integral with a whorl H which is carried in a suitable bearin I2. Spindle ill is freely rotatable when suitable driving means such as a belt (not shown) engages whorl ll. Bearing I2 is provided with external threads I3 for threading the bearing into a suitable recess (not shown) on the winding machine frame (not shown) where it is held rigidly in a fixed position.

The yarn package support positioning and retaining means on shaft l0 comprises a shaped mandrel 14 having a tapered upper shoulder I and a tapered lower shoulder i6 spaced by a shank portion ll. Mandrel I 4 is slidably mounted on shaft Ill and may be locked thereon at any desired vertical position by means of a set-screw I8. By reason of th adjustment thus provided, the desired frictional contact between the outer surface of mandrel l4 and the inner surface of yarn package support 3 may be maintained. The base of cone-shaped section 5 of yarn package support 3 rests on the shoulder I9 of a flange which is attached to a shoulder 2| integral with shaft [0, by means of rivets 22. As shown in the drawing, the internal wall of the lowermost portion-of the skirt 5 is of cylindrical form, and fitting into said lowermost portion of the skirt 5 is a cylindrical member projecting from the upper face of the flange 20.

The magazine wrap or transfer tail is applied in groove 1 of yarn package support 3 during the usual twisting and winding operation employing ring twisting means comprising a traversin ring rail, a ring mounted thereon and a traveler (not shown), whereby the desired twist is inserted into the yarn, with the traverse of the ring rail distributing th yarn windings on the rotating yarn package support 3. Thus, the yarn is thrown on to tapered upper section or barrel 4 in the usual manner and, after winding has commenced and the ring rail is at the bottom of the traverse stroke, the ring and traveler are momentarily shifted or depressed below the normal traverse of said ring and traveler by suitable means known to the art and not forming part of the present invention, so as to enable a portion of the yarn to be wound in groove 1. After a sufficient quantity of yarn has been placed in groove 1, the ring and traveler are permitted to resume their usual position and to traverse in the normal manner thus forming a yarn package having the contour 23 as shown in dot-dash line in Fig. 1, the lowermost windings of said yarn package being above the transfer tail placed in groove 1 on yarn package support 3.

My novel combination of yarn package support and shaped mandrel enables th frictional contact between the inner surface of said yarn package support and mandrel to be carefully adjusted or controlled since the position of the mandrel on the spindl may be varied. Therefore, by placing the mandrel in the most advantageous position relative to the spindle shaft ID, the precise amount of friction necessary to hold the yarn package support firmly may be attained. In this way, the yarn package support will not be held too closely nor so tightly as to become jammed and dofiing is made relatively easy.

In addition to the fact that frictional engagement between the yarn package support and the supporting mandrel may be carefully adjusted, the novel contour of the package support enables a yarn package of such shape to be formed, as indicated by reference numeral 23, that when the yarn is unwound from said yarn package as during warping operations, there is no tendency to produce variations in tension from the top to the bottom of the wind, as in the case of a yarn package where the bottom windings form an inverted cone. The variations in yarn tension in the lat ter instance are produced because the diameter of the yarn package at the base of the inverted cone is smaller than the diameter at the central portion of the yarn package and, at the bas of the yarn package where the sweep of the yarn balloon is at a maximum and exerts its greatest pull due to the greater weight of yarn being carried around, the yarn has to unwrap substantially twice for every unwrap from the central portion of th yarn package. Thus, not only is the greatest tension exerted on the yarn when it is unwound from this part of the yarn package but it is exerted thereon for a longer period of time. The degree of tension on the yarn unwinding at the base will differ markedly from the tension on the yarn when it is being unwound from the top of the package causing difficulties in warping.

Furthermore, with my novel yarn package support, the balloon produced in the winding operation is more uniform and, therefore, a spinning machine can be operated with less center-tocenter distances of spindles than when prior yarn packages are employed.

It is to be understood that the foregoin detailed description is given merely by Way of illus tration and that many variations may be made therein without departing from the spirit of my invention.

Having described my invention, what I desire to secure by Letters Patent is:

In a yarn twisting and winding device, the combination with a thin-wall yarn package support comprising a tapered barrel of gradually increasing diameter from top to bottom and a generally cone-shaped skirt integral with the lower end of said barrel, the lowermost portion of said skirt having an internal wall of cylindrical form and an external peripheral groove for receiving a magazine wrap, or a spindle comprising a shaft having adjustably mounted thereon a mandrel having spaced tapered shoulders for engaging the barrel of said package support intermediate the ends thereof, and a supporting flange connected to said shaft for engaging and positioning said package support, said flange having a cylindrical member projecting from the upper surface thereof and fitting into the lowermost portion of the skirt of said yarn package support.

, ALBERT W. KEIGHT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 127,748 Draper June 11, 1872 346,135 Thomas July 27, 1886 1,898,115 Aldrich Feb. 21, 1933 2,414,054 McDermott Jan. 7, 1947 FOREIGN PATENTS Number Country Date 152,212 Switzerland Apr. 1, 1932 283,325 Great Britain Jan. 12, 1928 335,407 Great Britain Sept. 25, 1930 396,721 Great Britain Aug. 8, 1933 645,414 France June 27, 1928 

